[ARM] Remove ThumbTargetMachines. (NFC)

Summary:
Thumb code generation is controlled by ARMSubtarget and the concrete
ThumbLETargetMachine and ThumbBETargetMachine are not needed.

Eric Christopher suggested removing the unneeded target machines in
https://reviews.llvm.org/D33287.

I think it still makes sense to keep separate TargetMachines for big and
little endian as we probably do not want to have different endianess for
difference functions in a single compilation unit. The MIPS backend has
two separate TargetMachines for big and little endian as well. 

Reviewers: echristo, rengolin, kristof.beyls, t.p.northover

Reviewed By: echristo

Subscribers: aemerson, javed.absar, arichardson, llvm-commits

Differential Revision: https://reviews.llvm.org/D33318

llvm-svn: 303733

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Target/ARM/ARMTargetObjectFile.cpp b/llvm/lib/Target/ARM/ARMTargetObjectFile.cpp
index 94f9e8dfebb..edbf2b99126 100644
--- a/llvm/lib/Target/ARM/ARMTargetObjectFile.cpp
+++ b/llvm/lib/Target/ARM/ARMTargetObjectFile.cpp
@@ -30,8 +30,8 @@ using namespace dwarf;
 
 void ARMElfTargetObjectFile::Initialize(MCContext &Ctx,
                                         const TargetMachine &TM) {
-  const ARMTargetMachine &ARM_TM = static_cast<const ARMTargetMachine &>(TM);
-  bool isAAPCS_ABI = ARM_TM.TargetABI == ARMTargetMachine::ARMABI::ARM_ABI_AAPCS;
+  const ARMBaseTargetMachine &ARM_TM = static_cast<const ARMBaseTargetMachine &>(TM);
+  bool isAAPCS_ABI = ARM_TM.TargetABI == ARMBaseTargetMachine::ARMABI::ARM_ABI_AAPCS;
   genExecuteOnly = ARM_TM.getSubtargetImpl()->genExecuteOnly();
 
   TargetLoweringObjectFileELF::Initialize(Ctx, TM);